Puzzle



FIG. 1 is an isometric view of a puzzle showing my new design;

FIG. 2 is a front orthographic view thereof, left side view being identical thereto; and,

FIG. 3 is a top orthographic view thereof.

The broken lines shown in FIGS. 1-3 are included for the purpose of illustrating environmental elements only and form no part of the claimed design. The rear, right side and bottom views are omitted and form no part of the claimed design. 

The ornamental design for a puzzle, as shown and described. 